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AVEVA Pipeline Operations for Liquids

Use Countdown to create and track volume targets for a Virtual Flow Computer (VFC)

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Use Countdown to create and track volume targets for a Virtual Flow Computer (VFC)

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  • Last UpdatedApr 24, 2025
  • 3 minute read

If the Administrator has configured your Virtual Flow Computer (VFC) as the source of one or more countdowncfg records, the Countdown section of the Virtual Flow Computer Control window may be used to create Gross Standard Volume (GSV) targets and track progress to those targets. For instructions on how to select a countdowncfg record, create, and control targets for your virtualflowcomputer record, refer to the AVEVA Pipeline Operations for Liquids Administrator Guide documentation.

Countdown is an external application that allows for the scheduling and controlling of targets and monitoring of progress to the active targets set against configured countdown sources. Specific fields and tables are supported as sources for the Countdown application. For more information, see Understand Countdown.

The following table lists the fields and actions available in the Countdown section of the Virtual Flow Computer Control window.

Fields

Description

Countdown (text box and [...] box)

The text box contains the countdowncfg table record that has the configured parameters to be used for the target tracking. The countdowncfg record in use can be changed by selecting (…) to bring up the Countdowncfg Select dialog. Only those records already configured to be used by this virtualflowcomputer record will be available in the Countdowncfg Select dialog.

Volume Target

The volume target of the current countdown. Depending on the target’s Absolute setting, this may be:

  • Volume relative to the current volume to be tracked.

  • An absolute volume target.

Remaining

Volume to go until the volume target is reached.

Time to Target

Estimated time to go until the target is reached.

State

State of the tracking session. There are five possible states:

  • Pending

  • Stopped

  • Active

  • Wait

  • Completed

    Note: While it is technically a state, Completed is not displayed as a state on the Batch Transfer Control window, as the current target will be displayed rather than the previously completed target.

ETA

Estimated date and time that the target will be reached.

Stop

Stop will:

  1. Change the current countdown from Active to Stopped.

  2. Stop the tracking.

  3. In the case of Full Automatic, will also complete the countdown. This button is unavailable if the current countdown state is not Active.

    Note: Stopping a countdown will reset the internal mechanism that tracks if an alarm has already been raised. When the countdown is re-started, and if the remaining volume / time is within the warning limits, an alarm will be raised again.

Ready

Select Ready to move the very first pending countdown to the current countdown position, with the Stopped state (applies to the Manual or Man Start/Auto Stop Countdown Type), or the Wait state (applies to the Full Automatic Countdown Type). Once a current countdown exists, this button is disabled.

Control

Select Control. This will allow you to control the active volume target, view the previous volume target, create new scheduled volume targets, and modify scheduled volume targets.

In addition, it is possible to make other configuration changes for the selected countdown configuration.

Create

Select Create to set a new volume target.

Note: This schedules a future target to be used. It does not replace the current target.

Start

Start will change the current countdown state from Stopped to Active, starting or re-starting (Progress will reset to zero) the tracking. This button is unavailable if the current countdown state is not Stopped.

Complete

Complete will move tracking to the next scheduled target by changing the current countdown state from Stopped to Complete, making it the previous countdown, and changing the next pending countdown state to Stopped, making it the current countdown. This button is disabled if the Countdown Type is Full Automatic or the current countdown state is not Stopped, or if there is no pending countdown remaining.